Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://digital.libraries.psu.edu/iiif/info/maps1/8830/manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b92f5dd4-311c-41ef-9a11-eac8a9fc6ac0",
      "cw-843a3443-4413-4778-9be1-fedbc4f811ad"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a8492b93-da51-4b5b-9f07-adcaa7781876",
    "manifestId": "https://digital.libraries.psu.edu/iiif/info/maps1/8830/manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-843a3443-4413-4778-9be1-fedbc4f811ad"
  }
}